Device for opening furnace-doors



( No Model.)

J. A. CARR. DEVICE FOR OPENING FURNACE DOORS.

Patented J an. 10, 1882.

'mVBNTORe- ATTORNEYS WITNESSES u. PETERS. mm-um w. wmin emp c.

UNITED STATES PATENT OFFICE.

JUDSON A. CARE, OF MONMOUTH, ILLINOIS.

DEVIQE FOR OPENING FURNACE-DOORS.

SPECIFICATION forming part of Letters Patent No. 252,183, dated January10,1882. Application filed May 17, 1881. (No model.)

To allwhom it may concern Be it known that I, JUDsoN A. OARR, 0fMonmouth, Warren county, Illinois, have invented anew and ImprovedDevice for Opening Furnace-Doors, of which the following is aspecification.

The object of this invention is to provide a more simple, inexpensive,convenient, and ett'ective device for opening and holding openfurnace-doors when it is desired to replenish the fires. V

The invention is especially adapted to boiler fire-boxes andhouse-heating furnaces; and it consists of a combined treadle-lever andconnecting-rods connected with the furnace-door,

which open upward in such a manner that the operator can open the doorby pressure upon the treadle and close the door by removing his footfrom the treadle.

In the drawings, Figure l is a front elevation, showing the deviceapplied to a furnacedoor. Fig. 2 is a side elevation of the same withpart bzokeu away to exhibit other parts.

Similar letters of reference indicate corresponding parts.

In the drawings, A represents a boiler or other fire-box or furnace; .B,the door-frame set therein, and O the door, hinged at a so as to openvertically. A standard, D, having a hook, b, formed on its upper end,projects upward from the door-frame B, and on this hook b is suspended ahorizontal lever, E, one end of which is connected by a rod,F, with aring or eye, 0, on the door 0, while the other end is connected with atreadle, G, by a rod, H, the opposite end of the treadle G being securedto the floor L by a staple or ring, K.

The weight of the door 0 is designed to overbalance the weight of thetreadle G and rod H, so that said door 0 shall remain closed when thereis no pressure on the said treadle G.

To open the door the operator places a foot upon the treadle G, as shownin Fig. 2, whereby the treadle G is brought down in a horizontalposition, and the door 0 also in an open horizontal position, as shown.

I am aware thatit is not new to hold open a furnace-door by a weightedcord passing over pulleys, or by a treadle on an arm which passesbeneath the door, or by a treadle connected by levers with a spiralshaft arranged under the foot-board; but

What I do claim as new and of my invention is- The combination, with thestandard D, secured at its lower end to the door-frame B and provided atits upper end with the hook b, of the lever E, suspended from said hook,rod H, secured at its upper end to one end of the lever E and attachedat its lower end to the free end of the treadle, treadle G, pivoted to'the can readily beopened by the operator by placing his foot on thetreadle and automatically closed by removing his foot therefrom,substantially as described.

J UDSON A. CARR. Witnesses:

. I. I. STORER,

.0. SEnewwK.

